Saw-swage



(No Model.) 2 Sheets-Sheet 1 H. W; WILLIAMS.

SAW SWAGE.

Patented'Jan. 10, 188.8.

"(No Mbdel.) 2 s 8 H. W. WILLIAMS. I beets Sheet 2 SAW SWAGB. No.376,128. Patented Jan. 10, 1888.

N: FEYlZRS. Bhb\o Lithographer- Walhirlglun. D (:V

UNITED STATES P TENT OFFICE.

HAMILTON W. WILLIAMS, OF NASHVILLE, TENNEssEE.

SAW-SWAGEE SPECIFICATION forming part of Letters Patent No. 376,128,dated January 10, 1888.

Application filed September 9, 1887. Serial No. 249,262. (No model.)

To to whom it may concern: Belt known that I, HAMILTON W. WILLIAMS, acitlzen of the United States, residing atNashville, in the county ofDavidson and State of be more fully set forth hereinafter, andparticularlyipointed out in the claims.

In the drawings, Figure 1 is a perspective view of a saw-swage embodyingmy improvements. Fig. 2 is an elevation of the same.

. Fig. 3 is a vertical sectional view taken on the line x of Fig. 2.Fig. 4 is a detached perspective view of parts of my improved sawswagingdevice. Figs. 5 and 6 are similar views of other parts thereof. Fig. 7is a detail of a portion of the saw;

A represents the base-plate of a machine,"

which is provided with the octagonal head B and with the lowerrectangular extension, 0. On the lower portion of the head B, at theouter side thereof, is formed a rectangular bed, D,which comprises araised flange, E. In the central portion of the extension G is made avertical slot, F, at the lower end of which is formed an offset or car,G, provided with a vertical threaded opening.

H represents a gage-head which is arranged transversely on the face ofthe extension 0, and is provided with a central opening. A bolt, I,extends through the said central opening and through the slot F, and isprovided on its inner end with an enlargedhead that works in a flangedway that communicates with the slot F. On the outer end of the bolt isscrewed a nut, K, which serves to secure the head to the bolt and toclamp the head .to the extension 0 atany desired vertical adjustment. Onthe under side of this head, at the center thereof, is an incisedopening, L, in the apex of which is a downward-projecting roundedoffset, M.

N represents a curved yoke which bears against the said offset, and isswiveled to the upper end of a screw, 0, that extends through andengages a threaded opening in the ear or offset G.

In the upper side of the flanged bed E, in

one side of the center thereof, is made a longitudinal recess, in whichis fitted an anvil, P. The said anvil is secured in'plaee by means ofbolts R, and'a key, S, is fitted in an opening made in the flanged bedat one end of the anvil and at right angles thereto, the said keybearing againstthe said anvil. The inner end of the anvil is providedwith a head, T, having the curved upper face, U. At a suitable distancefrom the headed end of the anvil. T the flange E is provided in itsupperside with a curved recess, V.

W represents a bridge that is bolted to the face of the head B at asuitable distance above the bed-flange E.

X represents a lever which is fulcrumed to the bridge by means of abolt, 'Y, the said bolt havingits outer end bifurcated to form ears Z.

A represents a holder-lever, which has its inner end inserted betweenthe ears Z, and pivoted on a bolt, B, that passes through alignedopenings in the said ears. The inner end of the said lever is extendedto one side, as shown, and provided with arms 0, which are adapted tobear against the outer sides of the upper and lower portions of thebed-flange E. The outer end of the said lever projects a suitabledistance, in order to form a handle.

The lower end of the lever X, which is opposed to the upper side of thebed-flange and to the head of the anvil, is bifurcated or slotted, andin the slot or opening formed therein is journaled a roller, D, which ismade of'hardened steel or other suitable material, and is circular inform. E represents a pair of toggle levers, which is flexibly jointed tothe upper end of the lever'X, and serves to connect the same to anoffset or other fixed point, F,

on one side of the head 13. An arm, G, is

sents a pair of adjustable stop-pins which project from the face of thehead B and have their inner extremities reduced and passed through theslots H, and are provided with clampingnuts K, which are screwed totheir inner ends and serve to clamp them to the head at any desiredadjustment in the slots.

L represents a clamping-lever, which is pivoted to one end of the bridgeV by means of one of the bolts that serve to secure the said bridge tothe bed. On the lower side of this lever, at the pivoted end thereof, isan arm, M, the end of which-is adapted to work in the curved recess V.The outer end of this lever is adapted to be connected to a pedal-lever,a, as shown in Fig. l, by means of a rod, b. N represents a coiledretractile spring, which has one end attached to the lever L, and itsupper end attached to a screw-eye or keeper, 0, that projects from theupper side of the head. A series of openings, 1?, is made in the saidhead, at suitable distances apart, and a stoppin, R, is adapted to beinserted in one of the said openings and limit the upward movement ofthe lever L.

The operation of my invention is as follows: The plate A is attached ina vertical position to one side of asuitable bench and is provided witha horizontal flange, S, that bears against the lower edge of the side ofthe work-bench and is secured thereto by means of bolts T, which passthrough openings in the ends of the flange and enter the side of thebench. The outer edge of the saw is arranged against the gage H in sucha position that one side of the saw bears against the bed-flange E. Oneside of one of the saw-teeth is caused to bear against the inclinedinner end of the anvilhead T. The screw 0 is turned so as to cause thegage H to hold the saw in position and to permit the saw to be movedlongitudinally from time to time. The curved offset I of the gage-headand the curved yoke M, which is swiveled to the screw 0 and bearsagainst the said offset, enable the gage-head to be turned to anydesired angle, according to the shape of the saw-blade, and thereby keepthe teeth of the saw in their proper position relative to theanvil-head. The lever A is turned down, so as to cause its arms to bearagainst the outer side of the saw-blade and thereby hold the latterfirmlyin contact with the bed-flange E, and the lever L is moveddownward, so as to cause its arm M to engage one of the sawteeth. Thelever G is in its initial position when it is turned to the left, asindicated in Fig. 1, thereby causing the toggle-jointed levers E to movethe upper end of the lever X to the left and to move the lower end ofthe said lever to the right from the curved face of the anvil-head. Thisleaves a slight space between the face of the roller D and the corner ofthe anvil-head, into which the point of the tooth to be swaged projects.The lever G is now turned to the right to the position indicated in Fig.2, which causes the lower end of the lever X to sweep to the left andthereby cause the roller D to impinge against the corner of the anvilhead and to move on the curved face thereof, and consequently compressthe point of the saw-tooth so forcibly between the opposing sides of theanvil-head and the roller that the point of the tooth will becomebroadened and swaged, as will be readily understood. By providing thelever X with the fulcrum'roller D the latter is caused to roll or rotateslightly when in contact with the point of the saw-tooth while swagingthe same, thereby reducing friction and consequently enabling the leverto be more readily operated.

Heretofore, so far as I am aware, saw-teeth have been swaged byarranging their points between anvil-heads and punches, which are causedto slide over the edges of the teeth while swaging the same. Thissliding movement of the punch on the edge of the tooth is accompanied byso much friction that it sometimes results in breaking off the point ofthe tooth,instead of swaging the same; but by substituting the rotatingroller for the punch and enabling the said roller to partly rotate whilein contact with the edge of the tooth the strain exerted on the tooth ismore easily distributed thereon, and although the pressure is in no wiserelaxed, yet the danger of breaking off the point of the toothis verysensiblylessened.

- The toggle-levers E, which connect the le ver X to a fixed point onthe bed-plate, are caused by the lever G, which is firmly attached tothe said toggle-jointed levers, to exert very greatly increased force onthe lever X at the instantwhen thelatter is completing its stroke andwhen the most powerful operation of the said lever is required.

The pins 1 enable the stroke of the lever G,

and consequently of the lever having the roller, to be regulated atwill, inasmuch as the lever G strikes against the said pins 1 at eachend of its stroke. In order to adapt the machine to be used for swagingcircular saws, I provide a gage, e, which is of the construction shownin Fig. 1, and which comprises an arm, .9, having a longitudinal slot,9. A sliding pin, 71, which works in the said slot, is adapted to bemoved in or out therein, and is provided with a nut, whereby it may beclamped at any desired position, and a bolt, 1', which also passesthrough the said slot and is clamped therein and serves as the fulcrumfor the arm.

Having thus described my invention, I claim- 1. In a saw swage, thecombination of the anvil, the operating-lever, and the roller journaledin the said lever and adapted to turn while in contact with the edge ofthe sawtooth, substantially as described.

2. The combination, in a saw-swage, of the anvil, the operating-leverhaving the roller D, for the purpose set forth, and the clampleveradapted to engage one of the teeth of the saw and hold the same inposition when the operating-lever is operated, substantially asdescribed.

3. The combination, in a saw-swage, of the lever X, the roller D,journaled at the free end thereof, the toggle-jointed levers connectingthe lever X to a fixed point, and the lever G, attached to the saidtoggle-jointed levers, substantially as described.

4. The combination, in asaw-swage, of the bed-plate, the operating-leverpivoted thereon and having the roller D, for the purpose set forth, andthe adjustable, stops to limit the motion of the operating-lever,substantially as described.

5. The combination, in a saw-swage, of the bed-plate and the anvilrecessed therein and bolted thereto, substantially as described.

6. The combination, in a saw-swage, of the bed-plate,the anvil recessedtherein and bolted thereto, and the key or wedge bearing against theouter end of the anvil to retain the latter against displacement,substantially as described.

7. The combination, in a saw-swage, of the bed-plate, the bridge securedthereto, the operating-lever fulcrurned to the bridge and having theroller D, the lever L,- also fulcrumed to the bridge and having the armM, for the purpose set forth, and the anvil, substantially as described.

8. The combination of the bed-plate having the bed-flange providedwiththe recess V, theerateiu the said recess, for the purpose set bed-plate,the lever L, having the arm M to engage one of the teeth of the saw andhold the same in position while being swaged, and the spring to normallydisengage the said lever from the saw when the lever is released,substantially as described.

10. The combination, in a saw-swage, of the bed-plate having slot F, theadjusting-screw O, the gage-head connected to the ends of the said screwand movable thereby, and the pivotal bolt extending through thegage-head and working in slot F, substantially as described.

11. The combination, in a saw-swage, of the adjustingscrew O, the yokeswiveled to the said screw, and the pivoted gage-head pivotally bearingon the yoke, substantially as described.

12. The combination, in a saw-swage, of the adj usting-screw, the curvedyoke swiveled thereto, and the gagehead having the convex

